<template>
  <div>
    <!-- 面包屑  -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图  -->
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>
      <el-table border stripe :data="roleList">
        <!-- 表格展开列  -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['bd-bottom', i1 === 0 ? 'bd-top' : '', 'v-center']"
                    v-for="(item1, i1) in scope.row.children"
                    :key="item1.id">
              <!-- 一级权限  -->
              <el-col class="v-center" :span="5">
                <el-tag closable
                        @close="removeRightById(scope.row, item1.id)">{{item1.authName}}
                </el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 二级和三级权限  -->
              <el-col :span="19">
                <!-- for循环渲染二级  -->
                <el-row :class="[i2 === 0 ? '' : 'bd-top', 'v-center']"
                        v-for="(item2, i2) in item1.children" :key="item2.id">
                  <!-- 二级权限  -->
                  <el-col :span="6">
                    <el-tag type="success"
                            closable
                            @close="removeRightById(scope.row, item1.id)">{{item2.authName}}
                    </el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 三级权限  -->
                  <el-col :span="18">
                    <el-tag type="warning"
                            v-for="(item3) in item2.children"
                            :key="item3.id"
                            closable
                            @close="removeRightById(scope.row, item3.id)">
                      {{item3.authName}}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 表格索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300">
          <template slot-scope="scope">
            <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
            <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
            <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 分配权限对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%" @close="setRightDialogClose">
      <el-tree show-checkbox :data="rightsList" :props="treeProps" node-key="id"
               default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
  export default {
    name: 'Roles',
    data () {
      return {
        // 角色列表
        roleList: [],
        // 分配权限对话框
        setRightDialogVisible: false,
        // 权限tree数据
        rightsList: [],
        // 树形控件配置
        treeProps: {
          label: 'authName',
          children: 'children'
        },
        // 默认选中的权限树节点id数组
        defKeys: [],
        // 分配权限时对应的角色id
        roleId: ''
      }
    },
    created () {
      this.getRoleList()
    },
    methods: {
      // 获取所有角色列表
      async getRoleList () {
        const { data: res } = await this.$http.get('roles')
        if (res.meta.status !== 200) return this.$message.error('获取角色列表失败！')
        this.roleList = res.data
        console.log('rights', this.roleList)
      },
      // 根据id删除权限
      async removeRightById (role, rightId) {
        const confirmResult = await this.$confirm('此操作将永久删除该权限，是否继续', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)
        if (confirmResult !== 'confirm') {
          return
        }
        const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
        if (res.meta.status !== 200) return this.$message.error('删除权限失败')
        // this.getRoleList()
        role.children = res.data
      },
      // 展示分配权限的弹窗
      async showSetRightDialog (role) {
        this.roleId = role.id
        // 获取所有权限的数据
        const { data: res } = await this.$http.get('rights/tree')
        if (res.meta.status !== 200) return this.$message.error('获取权限数据失败！')
        this.rightsList = res.data
        this.getLeafKeys(role, this.defKeys)
        this.setRightDialogVisible = true
      },
      // 获取角色包含的三级权限id
      getLeafKeys(node, arr) {
        if (!node.children) {
          return arr.push(node.id)
        }
        node.children.forEach(item => {
          this.getLeafKeys(item, arr)
        })
      },
      // 分配权限对话框的关闭事件
      setRightDialogClose() {
        this.defKeys = []
      },
      // 为角色分配权限
      async allotRights() {
        const keys = [
          ...this.$refs.treeRef.getCheckedKeys(),
          ...this.$refs.treeRef.getHalfCheckedKeys()
        ]
        const idStr = keys.join(',')
        const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
        if (res.meta.status !== 200) return this.$message.error('分配权限失败！')
        this.$message.success('分配权限成功！')
        this.getRoleList()
        this.setRightDialogVisible = false
      }
    }
  }
</script>

<style lang="less" scoped>
  .el-tag {
    margin: 7px;
  }

  .bd-top {
    border-top: 1px solid #eee;
  }

  .bd-bottom {
    border-bottom: 1px solid #eee;
  }

  .v-center {
    display: flex;
    align-items: center;
  }
</style>
